In the late 1800s railroads promoted tourism in the Southwest, which generated popular interest in American Indian cultures. Unfortunately, vandalism of ancient ruins also increased, prompting archeologists to seek federal protection of antiquities. The Daughters of 1812 was one of many groups that raised awareness of the issue and petitioned Congress to preserve these sites as national monuments.
Records of the U.S. House of Representatives, National Archives and Records Administration
Excerpt:
Whereas, With few exceptions the enlightened nations of the world have passed laws declaring their archaeological monuments and prehistoric objects to be the property of the nation . . . ; Therefore, your petitioners pray the Congress of the United States to enact a law or laws governing the right of collection, exploration or excavation in or adjacent to any prehistoric monuments and ruins on Government lands